.TH std::chrono::operator<<(std::chrono::year_month_day) 3 "2024.06.10" "http://cppreference.com" "C++ Standard Libary"
.SH NAME
std::chrono::operator<<(std::chrono::year_month_day) \- std::chrono::operator<<(std::chrono::year_month_day)

.SH Synopsis
   Defined in header <chrono>
   template< class CharT, class Traits >

   std::basic_ostream<CharT, Traits>&                         \fI(since C++20)\fP
       operator<<( std::basic_ostream<CharT, Traits>& os,

                   const std::chrono::year_month_day& ymd );

   Outputs a textual representation of ymd into the stream os. This first forms a
   std::basic_string<CharT> s consisting of a textual representation of the date in the
   format yyyy-mm-dd (same as the one output by formatter with the %F specifier). Then,
   if !ymd.ok(), appends " is not a valid date" to s. Inserts s into os.

   Equivalent to

   return os << (ymd.ok() ?
       std::format(os.getloc(), STATICALLY_WIDEN<CharT>("{:%F}"), ymd) :
       std::format(os.getloc(), STATICALLY_WIDEN<CharT>("{:%F} is not a valid date"),
   ymd));

   where STATICALLY_WIDEN<CharT>("...") is "..." if CharT is char, and L"..." if CharT
   is wchar_t.

.SH Return value

   os

.SH Example

    This section is incomplete
    Reason: no example

.SH See also

   format                                      stores formatted representation of the
   (C++20)                                     arguments in a new string
                                               \fI(function template)\fP
   std::formatter<std::chrono::year_month_day> formatting support for year_month_day
   (C++20)                                     \fI(class template specialization)\fP

.SH Category:
     * Todo no example
